Sash or store front construction



Aug. 24, 1937. c. D. LowRY 2,090,762

SASH 0R STORE FRONT CONSTRUCTION l Filed Feb. 5, 1934 2 Sheets-Sheet 1 Aug.^24, 1937. c. D. LowRY SASH OR STORE FRONT CONSTRUCTION 2 Sheets-Sheet 2 Filed Feb. 5, 1934 VPatented Aug. 24, 19.31 A

Aturno STATES snsn on. s'roan rnoN'r CONSTRUCTION .Clyde Dean Lowry, Lincoln, Nebr., assigner to Libbey-Owens-Ford Glass Company, Toledo, Ohio, a corporation of hio Application February 5, 1934, Serial No. 709,889

27 Claims. (Cl. 2li-56.4)

The present invention relates to sash or store iront construction and embodies improved iront and rear sections or strips combined, co-operating and tensioned in anovel manner to clamp and l hold the glass pane of the sash or store front.

My improvements may be embodied in a sash or front wherein the front and rear sections or. strips are solelyof relatively sti heavy extruded metal, or,.wherein these sections orstrips are of relatively thin gauge drawn or rolled moulding combined with, and bodily carrying, relatively stiff clips whose mounting and tensioning holds the mouldings in pane-clamping position.

My invention embodies a knife-edge fulcrum on one oi the sections or clips, as the case may be,

bearing on. or contacting, a seat on the other section or clip.

Preferably, the seat is the junction oi' conveying parts or surfaces which` den'e a sharp groove that centers the knife-edge fulcrum.

The knife-edge fulcrum and its seat permit the tensionable or so-called movable, or clamping, section to be adjusted by the tensioning means, such as a screw carried by the rear section, with facility and yet without displacement of the movable section from the knife-edge iulcrum.

I prefer, hnwever,l to pmvide a guard-lock which prevents displacement of the movable section from its knife-edge iulcrum. 'lfhis guard- 39 lock comprises a projecting guard on one'seci tion received freely within al slot or groove in' the Vother section, the protecting guard and the slot preferably lying in the arc ot a circle whose center is the edge o! the knife-edge fulcrum.

In lieu of a slot, the guard-lock may comprise merely two overlapping parts, preferably curved, or having curved surfaces, arranged to prevent the knife-edge fulcrum from becoming displaced.l

When the improvementsv are embodied in a s division, corner, or reverse bar the movable sections may.. be joinedby flexible means such as 55 drawn dspring clips, making them unitaryand enabling them to relatively dex in either direction for ease in handling, and when installing the construction.

My invention also embodies a new resilient automatic brake which prevents the application of too great pressure by the tensioning means, said brake being susceptible of modification and usable in a construction having my improved knife-edge fulcrum and guard-lock, or in otherl constructions.

The improvements may be used in connection with xed or sliding sash, or a easement window or transom which ishinged, or a store front.

The invention may be utilized lin other forms than those herein disclosed without departing from its essential principles.

In the accompanying drawings:

Figure 1 isa fragmentary sectional assembled view of one embodiment of the invention applied to a easement window, where the 'parts are of heavy extruded metal;

Fig. 2 is a similar view of a modication having rolled or drawn mouldings provided with extruded clips, the sections being shown in separated relationship;

Fig. 3 is a View like Fig. l showing a. modication adapted for caiking;

Fig. 4 is a view like Fig. 3, showing another modification;

Fig. 5 is a view like Fig. 2, illustrating the use of extruded clips carried by front and rear rolled or drawn mouldings corresponding to the form shown in Figf'd:

Fig. t is a fragmentary sectional view of another modication showing how the invention may employa different tensioning device adjustable from the front and, also, be used either in a single or double glazed installation;

Fig. 7 is a fragmentary sectional view of a division bar embodying the invention and illustrating how the improvements may be incorporated in corner or reverse bars;

Fig. 8 is a fragmentary view showing how the embodiment of Fig. l may be carried out by the use of extruded clips carried by rolled or moulded sections; v

Fig. 9 is a view like Fig. 'l showing a. modification of divislon, corner, or reverse bar wherein l the clamping sections are connected together by l* spring clips which flex both ways;

Figs. l0 and l1 are views lof modications employing, in addition to features shown. in preceding iigures, resilientarms or flanges and automatic braking devices which prevent excessive pressure on the pane; and

Fig. 12 is a view of a modication including a. resilient armor flange and a rigid arm which indicates to the installer when the tension is sufficient.

Referring iirst to Fig. -1, the rear or back section is lshown at I and the front or .outer adjustable section at 2, these being of heavy extruded metal.

In this embodiment, the sections I and 2 are supported by a easement or sash 3, to which section I is hinged at 4 in any suitable manner, showing how the invention may be used in connection with easements and transoms. The casement or sash may have drainage openings 5.

l5 The rear section I is extended forwardly at 6, thence upwardly as at 1 which part has a knifeedge fulcrum 8 extending. the entire length of the part 1 and serving as the sole support and hinging or fulcruming means for the' front or M outer section 2.

The knife-edge fulcrum 8 is a sharp ridge, as distinguished from knuckle-like, curved, or rounded fulcrums such as havel heretofore been proposed for the rockable mounting of adjustable 25 front or outer sections for sash or store fronts.

My knife-edge fulcrum 8 is seated in a valleylike seat or bearing 9 on the underside of section 2, said seat being dened by converging surfaces on the said section.

80 Referencel being had to the different embodiments of the invention shown in the drawings, particularly those of Figs. 1 to 6, it will be seen that fwhere the section 2 is ofextruded material, the seat or bearing 9 is dened by converging surfaces on thebody of the section 2 and on an arm. or flange carried thereby,and where extruded clips are used in connection with rolled or drawn mouldings, the seat is provided at the convergence of surfaces on the body and arm thereof further, that the arm or flange is the part or member through which the tensioning action is exerted on the front section as, -for instance,

In the construction shown in Fig. 1, the arm or flange has a second or auxiliary seat I4 corresponding to seat 9 and adapted to receive knife- 55 edge fulcrum 8 during the act of assembly or disassembly of thesection 2 with section I, las will presently appear.

The upstanding part 1 is provided with a curved overhanging surface I5 under which a curved 60 ilange I6 on section 2 is adapted to lie. Preferably, the curved parts I5, I6 lie in arcs of circles struck from the knife-edge fulcrum 8 as a center. The parts I5, I6, constitute a guard-lock which prevents accidental disengagement of the fulcrum 65 8 from its seat 9 or the prying off of the section 2. It will be understood that it is not intended that the parts I5, I6 engage while the sections I and 2 are in their'tensioned condition as shown in Fig. 1. If, however, attempt is made by an 70 unauthorized person to pry oir the section 2 from fulcrum 8, such action will be prevented by the guard-lock I5, I6. Furthermore, the parts I5, I6 also serve the purpose of keeping the section 2 in its proper position during the assembly until4 'l 75 the screws II are tightened but once the section 2 is properly tensioned, the tension maintains it on its fulcrum 8 without requiring engagement of parts I5, I6.

The pane may rest on metal or wooden blocks or a' strip I1, as is customary.

When disassembling the sections I and 2, the screws II are loosened to free the arm or ilange I0, the part I5 pushed under part I5 and the upper pane-engaging part pulled out, which will enable the auxiliary seat I4 to receive knife-edge fulcrum 8. The top of section 2 is then pushed in which will free part I6 from part I5, whereupon the section 2 may be lifted oi the fulcrum 8 and detached from section I. A reversal of these steps will enable the section 2 to be assembled with section I, the seat I4 iirst being made to receive the fulcrum 8 and reverse-order operations before described will complete the assembly, whereupon the screws II are tightened to tension the vfront section 2 on pane I3.

and bodilyr carry extruded clips I8 and I9, re-

spectively, at intervals of their lengths. The clip I8 has a seat 9 and an arm III' -provided with a supplemental seat I4. The part I6 of the guardlock which corresponds to the part I6 of Fig. l comprises the bent, freely projecting lower edge of sctio`r1'2and projects under the part I5 of the upstanding forward end of extruded clip I9.

'I'he knife-edge 8 at the top of part 1 is used in connection with seat I4`when assembling or disassembl'ing the sections I and 2, as described in connection with Fig. 1,

The clips I8 and I9 are held bythe bent ends of the sections I and 2 as shown at 20, 2l, 22, 23 andv additional thereto, the section I is re-bent to provide a gutter 24. Screws, such as shown at Il.are. used in Fig. 2 to co-operate with the arm I0 for tensioning purposes, as previously described in connection with Fig. 1. Drainage openings such as shown at 5 may be provided at suitable points.

v In the construction shown in Fig. 3, the sections I and 2 are of extruded metal and embody the principle of the construction shown in Fig. 1, though in different form. 'I'he rear section I has afn integral gutter 25, a base 6 which is provided with longitudinally extending weatherproof packing-receiving grooves 26 on its bottom, and an upstanding part 1 provided with a knifeedge fulcrum 8 adapted to engage a seat 9 on section 2. v

The upstanding part 1 is provided at its front with a. channel 21 which receives the lower part of the front section 2, said lower part in this formbeing of double construction. The arm or ilange I 0 which constitutes a part of the sec- -tion 2, is provided with a curved part I6, as in4 Figs. V1 and 2, which .constitutes a. part of the guard-lock whose other part is an arc-shaped channel or slot inthe upstanding part 1, the upper wall I5 of said slot serving the purpose of the walls I5 of Figs. 1 and 2. Screws II which are carried by the rear section I, bear on theiiange or arm I0 and provide for applying thedesired tension to the front section, as previously described.

Drainage openings (not shown) may be provided for the gutters 24 and 25 as well as at 5, as customary in sash and store front constructions.

In Fig. 4, the construction corresponds to that 'adapted to bear on seat 9- of clip I8 and to be of Fig. 3 except that the lower part ofthe front section 2 is solidinstead of double, as in' Fig. 3.

'I'he construction illustrated in Fig. 5 represents the same changes over that of Fig. 4 as 5 ds the construction of Fig. 2'to that of Fig. 1. The sections I and 2 are of rolled or drawn metal and bodily carry extruded clips 28, 29, respectively held by the bent parts 30, 3i, 32, 33 of said sections 2 and I. A gutter 34 is provided on section I. The screw hole I2 receives the tensioning screw Il whose tip is adapted to bear on'the arm of flange I0 of clip 28.

In Fig. 6, there is shown an embodiment for either single or double glazed sash embodying l5 the principle heretofore described, and particularly as shown in Figs. 3 and 4, butwith a modified tensioning means comprising screws II that engage threaded holes 35 is metal blocks or. pieces 35 which, on tightening the screws II, effect tension on the arms or flanges III. 'While the adaptation of the improvements to a double glazed sash having a common backstop 3l corresponding to section I, is shown in Fig. 6, it will be understood that the tensioning means illustrated may be used in connection with a single glazed sash. As shown, the' backstop 31 is integral with the other partsof section I and serves in the place of two such sections I, the construction taking the place of two independentinstallations i where double glazing is to be used.`

In the embodiments of Figs. 2, 3, 4, 5, 6, as in that of Fig. 1, the surfaces I5 are struck in the arc of a circle whose center lies in the knife-@edge 3 and, ordinarily, there is no contact between the surface' I5 and the uppersurface of the part I6 when the section 2 has been set and tensioned to hold the pane. y Y

In Fig. 7 there is shown an embodiment of the invention in a division bar. The same principle 40 may be used in a corner or reverse bar by employing clamping sections whose angular construction adapts them thereto.

The panes are engaged on their outer faces by an extruded division bar 33 having integral4 therewith two upstanding parts] each having a knife-edge fulcrum 3, corresponding to parts previously described. The two extruded clamping sections 39 have Vseats 3 to engage the respective knife-edge fulcrunys 3 and at their outer parts they bear on the inner faces of the panes I3.

'I'he panes are clamped between the bar 33 and the sections 39 by screw tensioning means, of which one example is shown, embodying a screw 43 whose head is connected to the bar 38 at 4I and whose stem is engaged by nuts 42 and 43 with an extruded back channel tensioning bar which is surmounted by a tubular bar 45 bearing thereon.

.,'rne bar u has knifeedge fulcrum at whichA engage angle or valleylike seats 41 on the clamping sections 33. n

rn Fig. s there 1s`iuustrad (as in Figs. `i: and 5),*a modification of the construction shown in Fig. 7, wherein the division bar 3l maybe of t5 rolled or drawn metal carrying extruded clips 43 at suitable intervals of its length, and the clamping sections 39 being provided with extruded clips 49 at suitable intervals of their length, said lsections and clips corresponding in shape and functions to' the bar 33 and sections. 'I'he clips 48, 49 are heldA by suitably formed parts of the bar 33 and section 39 as at 5l and 5I.

In Fig. 9, the construction is similar to that disclosed in Fig. 7 but as an additional improvement. the clamping sections 33 are connected Eby by. a screw II on section spring clips 5i.V secured to, and connecting the clamping sections 33 in such manner that said sections 39 may flex in relation to each other in both directions. This'feature facilitates the handling of the clamping sections 39 during assembly 5 and installation of the construction. The clips may be secured tothe sections 39 in any desired manner. As shown, the sections 39 are provided with channels 53 into which the bent ends of the clips are sprung, fitted or fastened.

In Figs. 10 andll, the construction'embodies the principle disclosed in the construction of Fig. 1, and other iigures previously described, carried out by a reversal of thearrangement of the knife-edge fulcrum and guard-lock, with the addition of an automatic brake which prevents too great tension being applied tothe p'ane, guards against breakage of the pane, and insures even pressure along the face o f the glass.`

Referring first to Fig. l0, the flange or arm, 20 instead of being a rigid part of the outer adjustable section 2, comprises a leaf spring arm 54 suitably secured to section 2 as at 55 and being bodily carried by, and projecting from, thesection 2 as does the arm or ange III and tensioned I, the latter having a gutter 56, if desired.

The section 2 has a knife-edge fulcrum 5' I on its lower part -which rests in a Aseat 58 of the character of seat 9 but the seat 58 is carried by the forward part of section I 'instead of by the section 2. It will be observed that the fulcruming action is the same in principle as heretofore but the arrangement is reversed.

'I'he guard-lock feature previously described is. carried out by the provision of the curved parts I5, I5, as heretofore, and, in addition, there 'are overlapping anges 59, 59' on sections 2 and I, respectively, which guard or protect the fulcrum 51 Aagainst weather conditions, the use of instruments by unauthorized persons who may seek to pry oiV the section 2, and for other purposes.

The opposing faces 60, 6I', which are preferably curved and lie in arcs of circles whose center is the knife-edge fulcrum 51, are adapted to contact each other when the screw II has been tensioned beyond the requisite extent to enable the section 2 to properly hold-the pane I3. When this has been done, an automatic braking action occurs at the surfaces 50, 6I', preventing further pressure from being exerted on the pane even though the screw II be screwed up tighter. 'I'his braking action prevents injury to the pane though not interfering with the adaptability of the section 2 to yield suiliciently to compensate for any vibration to which the pane may be subject.l

vThe surfaces'l5, I6 may be taped orprovided with any friction facing, if desired.

The construction shown in Fig. 11 is substantially that of Fig. 4 modified to include a leafA spring arm II whose nature and object is that of leaf spring arm 54 but adapted to the particular arrangement of upstanding knife-edge fulcrum 1 and parts I5, I6 illustrated in Fig. 4. The leai' spring arm 6I being shaped very `much like the arm of Fig. 4 and co-operating with the parts in the manner shown invFig. 4, also has the'added function of being forced against the surface I l to exert an automatic braking action 'thereon' should thescrew II be screwed up too tight. This con-v struction has all of the advantages of the one shown in Fig. 10, as previouslydescribed.

In Fig-12, the construction disclosed, embody, ing a leaf spring 32 suitably secured to section 2 at 55, is a supplemental means which receive;

the pressure from screw Il and, up to a certain extent of tensioning by said screw, enables the section 2 to yieldingly engage the pane, as with the constructions of Figs. and 11. T he section 5 2 being provided with a rigid arm or flange 63 integral therewith or 'fastened thereto, when the screw` Il is screwed up far enough, it will force the leaf spring 62 against thearm or flange 63 which will, by the added resistance, advise the l0 person making the installation that the tension is suilcient. The iiexible tensioning means, automatic brakn ing means, and other features may be embodied in other installations of 'sashand store fronts and are not necessarily limited to use `in connection with the knife-edge fulcrum and guard-lock features although particularly well adapted forA combination therewith, as will be apparent.

What I claim is:

1. In a sash or storefront construction, the combination with pane-holding sections, of a fulcrum on one section, two fulcrum seats on the other section for use at different times by said fulcrum during assembly and disassembly of said sections, and tensioning means for said sections.

A@.Iri a sash or store front construction, the combination with pane-holding sections, of a fulcrum on one section, two fulcrum seats on the other section for use at diiferent times by said fulcrum, means for tensioning said sections, and

a guard-lockwhich prevents displacement of the aforesaid fulcrum from its seat when the sections arefunder tension by said tensioning means.

3. In a sash or store front construction, the combination with pane-holding sections, of fu1- crum means for said sections, and tensioning means comprising, in part, a iiexible member cooperating with said sections, adapted to exert'an automatic braking action to vprevent excessive 40 tension and, in part, means for exerting tension on said iiexible member.

4. In a sash or store front construction, the

combination with pane-holding sections, of fulcrum means for said sections, and tensioning means comprising, in part, an outstanding resilient member carried by one of said sections and, in part, means carried by the other of saidsections, the latter means being engageable with said resilient member to place said member under ten- '50 sion, said resilient member effecting an automatic braking action to prevent excessive tension being put on the pane.

5. In a sash or store front construction, the

combination with pane-holding sections, of fulcrum means for said sections, -a guard-lock to maintain the fulcrum in operative condition, a resilient member-through which tension may be applied to said sections to hold the pane, means for tensioning said resilient member, and an autmatic brake which is brought into action by said resilient member to prevent excessive tension being put on the pane.

6. In a sash or store front construction, 'the combination with relatively movable pane-hold- 65 ing sections, of tensioning means for said sections, and a brake which is automatically applied .to prevent excessive tension.

7. In a sash or store front construction, the combination with relatively movable pane-hold- 70 ing sections, of tensioning means for said sections, including a resilient member which is subject to tension, and a brake which is automatically applied by said resilient member to prevent excessive tension on said member. 75 .8. In a sash or store front construction, the

combination with relatively movable pane-holding sections, of a tensioning devicey carried by one of said sections, a resilient member carried by the other section which is subject to the action of said tensioning device, and a brake which is carried by the resilient member and is automatically applied to one of the sections to prevent excessive tensioning, Y' l 9. In a. sash or store front construction, the combination of pane-holding sections, one section having a supplemental flexible means, and means extending from the other section for exerting pressure upon said supplemental means for indicating when sufficient tension has been applied.

10. In a sash or store front construction, the

combination with relatively movable pane-hold. ing sections, of a leaf spring connected with one section and a screw connected with the other section for exerting tension upon the spring, the spring serving to advise the operator when the tensionexerted by the screw is sumcient.

11. In a sash or store front construction, the combination of two pane holding sections constructed and adapted to embrace the window pane on opposite surfaces, the two sections being hingedly but detachably. connected together, the sections having concentric curved parts constructed from the hinge as a center, said parts constituting a guard lock located at the outer side of the window pane, and adjustable means extending from one section to the other for creating outward pressure on each at points away from ,the window pane whereby the portions of the sections contacting the opposite surfaces of the window .pane are forced securely in contact with the latter.

12. In a sash or store .front construction, the combination with pane-holding sections one of which is fulcrumed upon the other, of a guard- Y said sections.`v l 13. In a'sash or store front construction, the .combination with pane-holding sections'. one of which is fulcrumed upon the other, of a guardlock which prevents displacement of said section from the fulcrum, and tensioning means for said sections, said guard-lock comprising parts carried by' the respective sections which may interlock to prevent displacement of the section fulcrumed upon the other and control the tensioning means for said sections.

14. In a sash or store front construction, the combination with pane-holding sections one of which is fulcrumed upon the other, of a guardlock which prevents displacement of said section from the fulcrumcomprising curved faces on the respective sections which lie in arcs struck from the fulcrum as a center and may interlock to prevent displacement of the section from the section upon which it is fulcrumed, and tensioning means for said sections.

15. In a sash or store front construction, the combination of a xed and a movable pane-holding section adapted to receive and grip a pane of glass therebetween, adjustable tensioning means for effecting movement of the movable section toward the fixed section to grip said pane therebetween, and means constituting a positive stop for the tensioning means to prevent further forward movement thereof when said sections exert a substantially predetermined gripping pressure upon the pane.

16. In a sash or store front construction, the combination of a fixed and a movable pane-holdmovement of the movable section toward the fixed section to grip said pane therebetween, and means disposedin the path of said adjusting means for preventing tightening movement thereof beyond a predetermined point ln'espective of the thickness of pane being gripped. v

17. In a sash or store front construction, th combination of a iixed pane-holding section, a movable pane-holding section pivotally associated with said fixed section, said sections being adapted to receive and grip a pane of glass therebetween, an adjusting element for eiectingmovement of the movable section toward the fixed section and into gripping engagement with the pane, and a xed stop for limiting the movement of the adjusting element to prevent further movement of said movable section toward said fixed section.

18. In a sash or store front construction, the combination of a fixed pane-holding section, a movable pane-holding section pivotally assol ciated with said xed section, said sections being adapted to receive and grip a pane of glass therebetween, tensioning means carried by the -fixed section and engaging a portion of the movable section for moving the same towardsaid xed section to grip the pane therebetween, and a fixed stop also/on the iixed section for limiting the movement of the tensioning means-irrespective of the thickness of pane being gripped to prevent excessive tension on said pane.`

19. In a sash or storefront construction, the combination of a fixed pane-holding section, a movable pane-holding section pivotally associated with said xed section, said sections being adapted to'receive and grip a pane of glass therebetween, adjustable tensioning means for the sections, resilient means acted upon by said tensioning means for transmitting the movement.

section, resilientmeans carried by the movable f5 section and acted upon by said adjusting -means for transmitting movement thereof to the movable section to urge it into yielding engagement with the pane of glass, and a fixed stop for limiting the movement of the adjusting means' to prevent the amount of pressure exerted by the a substantially predetermined maximum.

21. In 'a sash or store front construction, the combination of a xed and a movable pane-holding section adapted to receive and grip a pane of a resilient member associated with said sections, said resilient member being actedupon by the ing engagement with the `pane ong-glass, and means for limiting the movement of the resilient member to prevent excessive pressure from being applied by the sections to the pane irrespective 0f 75 thethicknessofsaidpane.

sections upon the pane of glass from exceeding-v glass therebetween, tensioning means for the' sections including a rigidadjusting member and- 7`0 adjusting member to urge the sections into yield-4v 5 22. In afsash or store front construction, the combination of a fixed and a movable paneholdingsection adapted to receive and grip a pane of 'glass therebetween, an adjusting member carried by one section, a spring member acted upon by the adjusting member to urgev the sections into vyielding engagement with the pane, and means for limiting movement of the adjusting member to prevent any further increase in the .spring pressure when a substantially predetermined gripping pressure is applied by the sections to the pane.

23. In a sash or store front construction, the combination of a-iixed land a movable paneholding section adapted to receive and grip a pane of glass therebetween, tensioning means for said sections including cooperating rigid and resilient members associated with the sections for effecting relative movement thereof toward one another to grip the pane therebetween, and fixed means for limiting the movement of the rigid and resilient members to prevent further movement of the sections toward one another.'

24. In a sash or store front construction, the combination of a fixed and a movable pane-holding section adapted toreceive and grip a pane of glass therebetween, a resilient member carried by one of the sections,` an adjusting member carried by the other section and when tightened acting upon the resilient member to build up a spring pressure for urging the movable pane-holding section into yielding engagement with the pane, and means for limiting the movement of the adjusting member to prevent the building up of any further spring pressure when the sections exert a substantially predetermined gripping pressure upon the pane of glass.

25. In a sash or store front constructions. iixed section and a movable section associated therewith and relatively movable with respect to said fixed section, the said fixed section including a base having a raised portion constituting a seat, and means for clamping a pane of glass between said sections including a spring arm ilxed at one end to the movable section and 4having its opposite free end extending beneath the pane of glass toward the fixed section and spaced above said base, and av screw carried by the fixed sectionand engaging the free end of the spring arm for-urging an intermediate portion of said arm into engagement with said seat.

26. In a sash or store front construction, a iixedysection and a movable section associated' therewith and relatively movable with respect to said viiireazl section, the iixed section including a base the forward end of which is provided with vertically spaced portions constituting an outwardly opening channel while the said movable section is provided adjacent its lower end with an inwardly directed portion freely received in said channel, and means for clamping a pane of glass. between said sections including a spring element xed at one end to the movable section and having its opposite free end extending beneath 1the v .pane'of glass toward the xed section, and a tensioning member carried by the fixed section and 1 wardly opening channel, while the said movable section is provided adjacent its lower end with an inwardly directed portion freely received in said channel, and means for clamping' a pane of glass between said sections including a. spring arm xed at one end to the movable section and having its opposite free end extending beneath the arm for urging anV intermediate portion of saidv arm into engagement with said seat.

CLYDE DEAN LOWRY. 

